Determine Whether LLDP is Running and Recognizing Peers

In a correct DCB configuration, LLDP must be running and recognizing peers. If LLDP does not show the neighbors for port 21, perform the following steps to determine whether the peers are configured correctly and both links are up.

1. Display the DCB administrative, operational, and peer configurations.

   SEFOS# show interfaces extreme-ethernet 0/21 dcb enhanced-transmission-selection detail
   SEFOS# show interfaces extreme-ethernet 0/21 dcb priority-flow-control detail
   SEFOS# show interfaces extreme-ethernet 0/21 dcb application-etype-fcoe detail
   SEFOS# show interfaces extreme-ethernet 0/21 dcb counters

   In the following steps, DCB features are exchanged, and DCB is in operating mode with its peer.

2. Ensure that the interface is up on a specified port (port 0/21, in this example).

   SEFOS# show interfaces extreme-ethernet 0/21 description
   Interface    Status   Protocol  Description
   ---------    ------   --------  -----------
   Ex0/21       up       up

3. Display the LLDP global configuration details.

   SEFOS# show lldp
    
   LLDP is enabled
   Transmit Interval        : 30
   Holdtime Multiplier      : 4
   Reinitialization Delay   : 2
   Tx Delay                 : 2
   Notification Interval    : 5
   Chassis Id SubType       : Mac Address
   Chassis Id               : 00:10:e0:2c:0f:41

4. Display information about the neighbors learned on the interfaces.

   SEFOS# show lldp neighbors
    
   Capability Codes   :
   (R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device,
   (W) WLAN Access Point, (P) Repeater, (S) Station, (O) Other
    
   Chassis ID    Local Intf  Hold-time  Capability  Port Id
   848c6f2c      Ex0/21      121                    00:1b:21:bc:b6:ac
   Total Entries Displayed : 1

5. Display the local configuration, operational status, and peer configuration of the ETS feature.

   SEFOS# show interfaces extreme-ethernet 0/21 dcb enhanced-transmission-selection detail
    
   Port             :      Ex0/21
   Show Type        :      Admin Config
   Feature          :      Enhanced Transmission Selection
   Enable           :      true
   Advertise        :      true
   Willing          :      true
   Priority         :      0       1       2       3       4       5       6       7
   Traffic Class  :      0       1       2       3       4       5       6       7
   Bandwidth       :     50      50      0       0       0       0       0       0
   Algorithm       :      2       2       2       2       2       2       2       2
   Max Traffic Class:  8
    
   Show Type        :      Oper Config
   Feature          :      Enhanced Transmission Selection
   Errors           :      0x0 - none
   Syncd with Peer  :      false
   Priority         :      0       1       2       3       4       5       6       7
   Priority         :      0       1       2       3       4       5       6       7
   Bandwidth       :     50      30      20      0       0       0       0       0
   Algorithm       :      2       2       2       2       2       2       2       2
   Max Traffic Class:  8
    
   Show Type        :      Peer Config
   Feature          :      Enhanced Transmission Selection
   Local Interface  :      Ex0/21
   Status           :      successful
   Enable           :      true
   Willing          :      true
   Priority         :      0       1       2       3       4       5       6       7
   Traffic Class  :      0       1       2       3       4       5       6       7
   Bandwidth       :     50      30      20      0       0       0       0       0
   Algorithm       :      2       2       2       2       2       2       2       2
   Max Traffic Class:  8
    
   ------------------------------------------------------------
    
   Total Entries Displayed : 1

6. Display the local configuration, operational status, and peer configuration of the PFC feature.

   SEFOS# show interfaces extreme-ethernet 0/21 dcb priority-flow-control detail
    
   Port             :      Ex0/21
   Show Type        :      Admin Config
   Feature          :      Priority Flow Control
   Enable           :      true
   Advertise        :      true
   Willing          :      true
   Priority Mask    :   0       0       0       0       1       0       0       0
   Max Traffic Class: 8
    
   Show Type        :      Oper Config
   Feature          :      Priority Flow Control
   Errors           :      0x0 - none
   Operational Mode :      true
   Syncd with Peer  :      true
   Priority Mask    :   0       0       0       0       1       0       0       0
   Max Traffic Class: 8
    
   Show Type        :      Peer Config
   Feature          :      Priority Flow Control
   Local Interface  :      Ex0/21
   Status           :      successful
   Enable           :      true
   Willing          :      false
   Priority Mask    :   0       0       0       0       1       0       0       0
   Max Traffic Class: 8
    
   ------------------------------------------------------------
    
   Total Entries Displayed : 1

7. Display the local configuration, operational status, and peer configuration of the application priority feature.

   SEFOS# show interfaces extreme-ethernet 0/21 dcb application-etype-fcoe detail
    
   Port             :      Ex0/21
   Show Type        :      Admin Config  
   Feature          :      Application FCoE
   Enable           :      true
   Advertise        :      true
   Priority Map      :    0       0       0       1       0       0       0       0
    
   Show Type        :      Oper Config
   Feature          :      Application FCoE     
   Errors           :      0x0 - none
   Priority Map      :    0       0       0       1       0       0       0       0
    
   Show Type        :      Peer Config
   Feature          :      Application FCoE
   Local Interface  :      Ex0/21
   Priority Map      :    0       0       0       1       0       0       0       0
    
   ------------------------------------------------------------
    
   Total Entries Displayed : 1

   In addition to the commands shown in this section, you can also use the following commands to display information:

   • show lldp

   • show lldp interface

   • show lldp neighbor

   • show lldp traffic